We sat down with Bruna Kajiya to discuss the latest update to her signature Mystic harness. The 2025 Gem BK has a sleek new look, refined women-specific fit, and pro-level tech, blending strength, style, and comfort. Bruna shares what makes it a game changer for riders who push limits.

Hi Bruna, it’s great to have you with us! The Gem BK has been a long-standing harness in the Mystic range; what’s new for 2025?

I love to talk about my collection with Mystic. Every year, we work on stepping it up and bringing something fresh and high-performance. Gem BK keeps everything that riders love but with some key refinements. The tech aspect has the Roven Composite for lightweight and strength; this is the same high-quality composite used in the Majestic. We shaped this hardshell to hug a sleeker, women-specific silhouette and have an effortless fit. We also have the Fix Foam padding, which is a game changer—it molds to your body, making it super conformable. 

What inspired the design and look of the Gem BK, and how involved were you in shaping the visual direction?

I always choose a design that’s me, something that feels like an extension of my personality and my current moment in life. Visually, I wanted power and fluidity—key traits of a good riding style. I want it to evoke femininity, confidence, and vibrance, making a statement on the water.

The Bionic Core Frame on this harness hits an 8/10 stiffness and a 7/10 torsion flex. How does that balance of rigidity and flexibility support your riding style, especially when pushing limits in freestyle or big air?

This balance is key for me. The 8/10 stiffness gives me the back support I need when I’m loading up for a big trick or taking hard landings, while the 7/10 torsion flex allows me to move dynamically without feeling locked in. When riding with power, you need that combination—it keeps you connected but still lets you move naturally.

You’ve been riding and competing at the highest level for years—what are some “non-negotiable” features a harness must have for you personally?

There are a few non-negotiables for me. Since a harness is so key to being comfortable in the water, comfort is number one. A harness has to fit perfectly—no pressure points, no pinching. Support is another big one; if a harness is too soft, it doesn’t distribute forces properly, and you feel it in your lower back. And I need to be fresh for the next training session. And, of course, durability—it needs to handle the impact and stress of hard crashes and long sessions without wearing out.

Did any of those preferences shape the final design of the Gem BK?

Absolutely! Based on my feedback from years of riding, Mystic and I worked closely to refine the shape and stiffness levels. We adjusted the way it wraps around the body to give better support without restricting movement. The materials and padding were chosen to keep it comfortable even during marathon sessions. Everything in this harness is designed with performance in mind.

What specifics does a woman need in a harness that are different from men?

The female body has a different shape, so the harness needs to accommodate that—especially in the waist and hip areas. A men’s harness often sits too high or puts pressure in the wrong places. The Gem NK is tailored for women, with a shape that better fits our curves and distributes pressure evenly so you get a snug, comfortable fit without discomfort.

What would you say makes the Gem BK stand out most for riders?

It’s the perfect mix of strength and freedom. You get solid back support without losing mobility, and it’s designed specifically for women. I feel that’s a key element. We actually put time and effort into making it as comfortable as possible. Plus, the look is next-level: strong, stylish, and made for pushing boundaries.

 

By Jen Tyler
Italian/Egyptian Jen Tyler grew up on the sandy beaches of the Red Sea and has been on the IKSURFMAG & Tonic Mag team since 2017.

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